introducing a tutorial for the retina model
adding retina tutorial
updated tutorial, need spell check, validation, nicer images and a discussion on parameters
updated tutorial, rapid spell check, retina parameters discussion added
added retina code tutorial
updated first image sample
minor update
minor updates for doc redirections and tutorial images size
added an example of using cv::VideoCapture to read image sequences like 000.pmg, 001.png ... 100.png etc.
removed separate example for reading image sequences and modified starter_video.cpp to better explain the functionality of VideoCapture. I also added a bit more explanation in the documentation of the VideoCapture interface
removed starter_image_sequence.cpp
Revert "Merge pull request #836 from jet47:gpu-modules"

This reverts commit fba72cb60d27905cce9f1390250adf13d5355c03, reversing
changes made to 02131ffb620f349617a65da334591eca5d3cb23b.
The deletion of "cv.py" file (Commit b2ba8b9) breaks "make install"
Fixed typo
starter_video.cpp changed CV WINDOW KEEPRATIO to just WINDOW KEEPTATIO to fix build error
starter_video.cpp hid local functions
Changed visibility of the virtual functions in OnePassStabilizer and TwoPassStabilizer that are derived from StabilizerBase from private to protected to enable stabilizer implementations that are derived from OnePassStabilizer and TwoPassStabilier to properly overwrite these functions
Add ocl::PlatformName to ocl::Info.
updated retina interface for cleaner use, following OpenCV standards
forgot method name update